Is the fact that our universe contains fine-tuned life evidence that we live in a multiverse? Ian Hacking and Roger White influentially argue that it is not. We approach this question through a systematic framework for self-locating epistemology. As it turns out, leading approaches to self-locating evidence agree that the fact that our own universe contains fine-tuned life indeed confirms the existence of a multiverse (at least in a suitably idealized setting). This convergence is no accident: we present two theorems showing that, in this setting, any updating rule that satisfies a few reasonable conditions will have the same feature. The conclusion that fine-tuned life provides evidence for a multiverse is hard to escape.
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Research Article| July 01 2022
Multiple Universes and Self-Locating Evidence
The Philosophical Review (2022) 131 (3): 241–294.
Yoaav Isaacs, John Hawthorne, Jeffrey Sanford Russell; Multiple Universes and Self-Locating Evidence. The Philosophical Review 1 July 2022; 131 (3): 241–294. doi: https://doi.org/10.1215/00318108-9743809
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